diff --git a/packages/react-native-codegen/src/parsers/__tests__/parsers-commons-test.js b/packages/react-native-codegen/src/parsers/__tests__/parsers-commons-test.js
new file mode 100644
index 00000000000000..991198a1e33173
--- /dev/null
+++ b/packages/react-native-codegen/src/parsers/__tests__/parsers-commons-test.js
@@ -0,0 +1,80 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict-local
+ * @format
+ * @oncall react_native
+ */
+
+'use-strict';
+
+const {wrapNullable, unwrapNullable} = require('../parsers-commons.js');
+
+describe('wrapNullable', () => {
+  describe('when nullable is true', () => {
+    it('returns nullable type annotation', () => {
+      const result = wrapNullable(true, {
+        type: 'BooleanTypeAnnotation',
+      });
+      const expected = {
+        type: 'NullableTypeAnnotation',
+        typeAnnotation: {
+          type: 'BooleanTypeAnnotation',
+        },
+      };
+
+      expect(result).toEqual(expected);
+    });
+  });
+  describe('when nullable is false', () => {
+    it('returns non nullable type annotation', () => {
+      const result = wrapNullable(false, {
+        type: 'BooleanTypeAnnotation',
+      });
+      const expected = {
+        type: 'BooleanTypeAnnotation',
+      };
+
+      expect(result).toEqual(expected);
+    });
+  });
+});
+
+describe('unwrapNullable', () => {
+  describe('when type annotation is nullable', () => {
+    it('returns original type annotation', () => {
+      const result = unwrapNullable({
+        type: 'NullableTypeAnnotation',
+        typeAnnotation: {
+          type: 'BooleanTypeAnnotation',
+        },
+      });
+      const expected = [
+        {
+          type: 'BooleanTypeAnnotation',
+        },
+        true,
+      ];
+
+      expect(result).toEqual(expected);
+    });
+  });
+  describe('when type annotation is not nullable', () => {
+    it('returns original type annotation', () => {
+      const result = unwrapNullable({
+        type: 'BooleanTypeAnnotation',
+      });
+      const expected = [
+        {
+          type: 'BooleanTypeAnnotation',
+        },
+        false,
+      ];
+
+      expect(result).toEqual(expected);
+    });
+  });
+});